feat(challenge13): create challenge 13 about styling

apps/rxjs-race-condition/src/app/app.component.ts

@@ -1,5 +1,5 @@
-import { NxWelcomeComponent } from './nx-welcome.component';
 import { Component } from '@angular/core';
+import { NxWelcomeComponent } from './nx-welcome.component';
 
 @Component({
   standalone: true,
@@ -11,3 +11,5 @@ import { Component } from '@angular/core';
 export class AppComponent {
   title = 'rxjs-race-condition';
 }
+
+// faire une app qui fonctionne mais pas dans les tests e2e à cause du délai de la requete http.

apps/styling/.eslintrc.json

@@ -0,0 +1,36 @@
+{
+  "extends": ["../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "rules": {
+        "@angular-eslint/directive-selector": [
+          "error",
+          {
+            "type": "attribute",
+            "prefix": "app",
+            "style": "camelCase"
+          }
+        ],
+        "@angular-eslint/component-selector": [
+          "error",
+          {
+            "type": "element",
+            "prefix": "app",
+            "style": "kebab-case"
+          }
+        ]
+      },
+      "extends": [
+        "plugin:@nrwl/nx/angular",
+        "plugin:@angular-eslint/template/process-inline-templates"
+      ]
+    },
+    {
+      "files": ["*.html"],
+      "extends": ["plugin:@nrwl/nx/angular-template"],
+      "rules": {}
+    }
+  ]
+}

apps/styling/README.md

@@ -0,0 +1,33 @@
+<h1>Customizable style</h1>
+
+> Author: Thomas Laforge
+
+Styling is an important part of a day job of a frontend developer often underestimated. In Angular application, I often see people use `@Input()` to customize the style of their component. But `@Input()` should be used only for the logic and we should use other technique for styling. We can take advantage of css variable and host-context.
+
+In this challenge, you will need to use both to delete all `@Input()` from your code.
+
+Styling is an important aspect of a frontend developer's day job, but it is often underestimated. In Angular applications, I frequently see people using `@Input()` to customize the style of their components. However, `@Input()` should only be used for logic; and other techniques, such as CSS variables and host-context, should be used for styling.
+
+In this challenge, you will need to use both CSS variables and :host-context to remove all `@Input()` from your code.
+
+### Constraints:
+
+- In your final submission, your component should not contain any lines of code. All styling should be handled within the decorator _(or external css files if you prefer)_
+
+### Submitting your work
+
+1. Fork the project
+2. clone it
+3. npm install
+4. **nx serve styling**
+5. _...work on it_
+6. Commit your work
+7. Submit a PR with a title beginning with **Answer:13** that I will review and other dev can review.
+
+<a href="https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A13+label%3Aanswer"><img src="https://img.shields.io/badge/-Solutions-green" alt="styling"/></a>
+
+<!-- TODO: uncomment when done late -->
+<!-- <a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A13+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="styling solution author"/></a>
+<a href="{Blog post url}" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/-Blog post explanation-blue" alt="styling blog article"/></a> -->
+
+_You can ask any question on_ <a href="https://twitter.com/laforge_toma" target="_blank" rel="noopener noreferrer"><img src="./../../logo/twitter.svg" height=20px alt="twitter"/></a>

apps/styling/project.json

@@ -0,0 +1,76 @@
+{
+  "name": "styling",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "sourceRoot": "apps/styling/src",
+  "prefix": "app",
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:browser",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/styling",
+        "index": "apps/styling/src/index.html",
+        "main": "apps/styling/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/styling/tsconfig.app.json",
+        "inlineStyleLanguage": "scss",
+        "assets": ["apps/styling/src/favicon.ico", "apps/styling/src/assets"],
+        "styles": ["apps/styling/src/styles.scss"],
+        "scripts": []
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "buildOptimizer": false,
+          "optimization": false,
+          "vendorChunk": true,
+          "extractLicenses": false,
+          "sourceMap": true,
+          "namedChunks": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "executor": "@angular-devkit/build-angular:dev-server",
+      "configurations": {
+        "production": {
+          "browserTarget": "styling:build:production"
+        },
+        "development": {
+          "browserTarget": "styling:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "browserTarget": "styling:build"
+      }
+    },
+    "lint": {
+      "executor": "@nrwl/linter:eslint",
+      "outputs": ["{options.outputFile}"],
+      "options": {
+        "lintFilePatterns": ["apps/styling/**/*.ts", "apps/styling/**/*.html"]
+      }
+    }
+  },
+  "tags": []
+}

apps/styling/src/app/page.component.ts

@@ -0,0 +1,17 @@
+/* eslint-disable @angular-eslint/component-selector */
+import { Component } from '@angular/core';
+import { TextStaticComponent } from './static-text.component';
+import { TextComponent } from './text.component';
+
+@Component({
+  selector: 'page',
+  standalone: true,
+  imports: [TextStaticComponent, TextComponent],
+  template: `
+    <static-text></static-text>
+    <static-text type="error"></static-text>
+    <static-text type="warning"></static-text>
+    <text [font]="15" color="blue">This a a blue text</text>
+  `,
+})
+export class PageComponent {}

apps/styling/src/app/static-text.component.ts

@@ -0,0 +1,33 @@
+/* eslint-disable @angular-eslint/component-selector */
+import { Component, Input } from '@angular/core';
+import { TextComponent } from './text.component';
+
+export type StaticTextType = 'normal' | 'warning' | 'error';
+
+@Component({
+  selector: 'static-text',
+  standalone: true,
+  imports: [TextComponent],
+  template: `
+    <text [font]="font" [color]="color">This is a static text</text>
+  `,
+})
+export class TextStaticComponent {
+  @Input() set type(type: StaticTextType) {
+    switch (type) {
+      case 'error': {
+        this.font = 30;
+        this.color = 'red';
+        break;
+      }
+      case 'warning': {
+        this.font = 25;
+        this.color = 'orange';
+        break;
+      }
+    }
+  }
+
+  font = 10;
+  color = 'black';
+}

apps/styling/src/app/text.component.ts

@@ -0,0 +1,16 @@
+/* eslint-disable @angular-eslint/component-selector */
+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'text',
+  standalone: true,
+  template: `
+    <p style="font-size: {{ font }}px; color: {{ color }}">
+      <ng-content></ng-content>
+    </p>
+  `,
+})
+export class TextComponent {
+  @Input() font = 10;
+  @Input() color = 'black';
+}

apps/styling/src/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>Styling</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <page></page>
+  </body>
+</html>

apps/styling/src/main.ts

@@ -0,0 +1,4 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { PageComponent } from './app/page.component';
+
+bootstrapApplication(PageComponent).catch((err) => console.error(err));

apps/styling/src/styles.scss

@@ -0,0 +1 @@
+/* You can add global styles to this file, and also import other style files */

apps/styling/tsconfig.app.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "types": []
+  },
+  "files": ["src/main.ts"],
+  "include": ["src/**/*.d.ts"],
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}

apps/styling/tsconfig.editor.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {
+    "types": []
+  }
+}

apps/styling/tsconfig.json

@@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    "target": "es2022",
+    "useDefineForClassFields": false,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.editor.json"
+    }
+  ],
+  "extends": "../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}